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Acquisitions - Summary of Supplemental Proforma Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Business Acquisition Pro Forma Information [Abstract]    
Revenue $ 282,868 $ 754,520
Net income (loss) $ 20,566 $ (30,645)
Basic net income (loss) per common share $ 0.38 $ (0.71)
Diluted net income (loss) per common share $ 0.38 $ (0.71)